using System;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        string[] s = Console.ReadLine().Split();
        long n = long.Parse(s[0]);
        long k = long.Parse(s[1]);

        long ans = n / (k + 1) + 1;

        Console.WriteLine(ans);
        Console.Read();
    }
}